Animated Frame-mutation Image Format
Working Group


Welcome to the official site for the AFIF Working Group! We are a group of developers and engineers from across the globe and comprised of many different backgrounds, educations, and skill levels. Our group is independent, meaning that we are not a part of a standards organization like the IEEE, IETF, W3C, or the ISO, though we do hope to see our specification recognized by these organizations someday!

More specifically, AFIF is a specification for an animated image format that is web-friendly, compact, and allows for high-resolution, high framerate, and true-color animations without being too large in file size or tanking the browser’s performance. This is done by storing only the changes between previous cumulative frames in comparison to the first frame, instead of a new, full frame every time.

Main Contributors

Main contributors are the people responsible for maintaining the specification and its related software. Currently, the main contributors of the AFIF specification and its related software are the following:

How To Contribute?

We’re always looking for people to help mature AFIF and create software and code libraries that implement the specification. If you’re one of these people, please visit our “Join” page and find out how to contribute to the project! To learn more about the specification first, please visit our “Specification” page.